100 lines
3.4 KiB
C++
100 lines
3.4 KiB
C++
/*
|
|
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <LibJS/Bytecode/Executable.h>
|
|
#include <LibJS/Bytecode/Label.h>
|
|
#include <LibJS/Bytecode/Register.h>
|
|
#include <LibJS/Forward.h>
|
|
#include <LibJS/Heap/Cell.h>
|
|
#include <LibJS/Runtime/FunctionKind.h>
|
|
#include <LibJS/Runtime/VM.h>
|
|
#include <LibJS/Runtime/Value.h>
|
|
|
|
namespace JS::Bytecode {
|
|
|
|
class InstructionStreamIterator;
|
|
|
|
class Interpreter {
|
|
public:
|
|
explicit Interpreter(VM&);
|
|
~Interpreter();
|
|
|
|
[[nodiscard]] Realm& realm() { return *m_realm; }
|
|
[[nodiscard]] Object& global_object() { return *m_global_object; }
|
|
[[nodiscard]] DeclarativeEnvironment& global_declarative_environment() { return *m_global_declarative_environment; }
|
|
VM& vm() { return m_vm; }
|
|
VM const& vm() const { return m_vm; }
|
|
|
|
ThrowCompletionOr<Value> run(Script&, JS::GCPtr<Environment> lexical_environment_override = nullptr);
|
|
ThrowCompletionOr<Value> run(SourceTextModule&);
|
|
|
|
ThrowCompletionOr<Value> run(Bytecode::Executable& executable, Bytecode::BasicBlock const* entry_point = nullptr)
|
|
{
|
|
auto result_and_return_register = run_executable(executable, entry_point);
|
|
return move(result_and_return_register.value);
|
|
}
|
|
|
|
struct ResultAndReturnRegister {
|
|
ThrowCompletionOr<Value> value;
|
|
Value return_register_value;
|
|
};
|
|
ResultAndReturnRegister run_executable(Bytecode::Executable&, Bytecode::BasicBlock const* entry_point);
|
|
|
|
ALWAYS_INLINE Value& accumulator() { return reg(Register::accumulator()); }
|
|
ALWAYS_INLINE Value& saved_return_value() { return reg(Register::saved_return_value()); }
|
|
Value& reg(Register const& r)
|
|
{
|
|
return vm().running_execution_context().registers[r.index()];
|
|
}
|
|
Value reg(Register const& r) const
|
|
{
|
|
return vm().running_execution_context().registers[r.index()];
|
|
}
|
|
|
|
[[nodiscard]] Value get(Operand) const;
|
|
void set(Operand, Value);
|
|
|
|
void do_return(Value value)
|
|
{
|
|
reg(Register::return_value()) = value;
|
|
reg(Register::exception()) = {};
|
|
}
|
|
|
|
void enter_unwind_context();
|
|
void leave_unwind_context();
|
|
void catch_exception(Operand dst);
|
|
void restore_scheduled_jump();
|
|
|
|
void enter_object_environment(Object&);
|
|
|
|
Executable& current_executable() { return *m_current_executable; }
|
|
Executable const& current_executable() const { return *m_current_executable; }
|
|
BasicBlock const& current_block() const { return *m_current_block; }
|
|
Optional<InstructionStreamIterator const&> instruction_stream_iterator() const { return m_pc; }
|
|
|
|
Vector<Value>& registers() { return vm().running_execution_context().registers; }
|
|
Vector<Value> const& registers() const { return vm().running_execution_context().registers; }
|
|
|
|
private:
|
|
void run_bytecode();
|
|
|
|
VM& m_vm;
|
|
BasicBlock const* m_scheduled_jump { nullptr };
|
|
GCPtr<Executable> m_current_executable { nullptr };
|
|
BasicBlock const* m_current_block { nullptr };
|
|
GCPtr<Realm> m_realm { nullptr };
|
|
GCPtr<Object> m_global_object { nullptr };
|
|
GCPtr<DeclarativeEnvironment> m_global_declarative_environment { nullptr };
|
|
Optional<InstructionStreamIterator&> m_pc {};
|
|
};
|
|
|
|
extern bool g_dump_bytecode;
|
|
|
|
ThrowCompletionOr<NonnullGCPtr<Bytecode::Executable>> compile(VM&, ASTNode const&, ReadonlySpan<FunctionParameter>, JS::FunctionKind kind, DeprecatedFlyString const& name);
|
|
|
|
}
|